Shade-roller.



736.424. PATENTED AUG; 1,3, 1903.

W. MUMBRAUER.

SHADE ROLLER. APPLIQATION mum MAY 5.190s.

no MODEL.

FIG. I.

Patented August 18, 1903.

1? FFCEQ WILLIAM MUMBRAUER, OF NEW YORK, N. Y.

SHADE-ROLLER;

SPECIFICATION forming part of Letters Patent N01736f124, dated August18, 1903.

Application filed May 5,1903. Serial No. 155,699. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM MUMBRAUER, a citizen of the United States,residing at New York city, (Bronx,) countyand State of New York, haveinvented certain new and useful Improvements in Shade-Rollers, of whichthe following is a specification.

This invention relates to a shade-roller which is so constructed thatits operative parts are thoroughly protected, will work freely, and arenot liable to come out of order.

In the accompanying drawings, Figure 1 is a front view of a window-frameprovided with my improved shade-roller. Fig. 2 is a longitudinal sectionthrough the roller; Fig. 3, an enlarged cross-section on line 3 3, Fig.2; Fig.

- 4:, a similar cross-section showing the parts in a diiferent position,and Fig. 5 a top View of the perforated disk. i

The letter a represents the tubular rotatable shell of a shade-roller,through which "passes axially the fixed spindle b, having a squared endI), which is received by oneof the brackets c. A round gudgeon b on theopposite end of the shell (1 is free to rotate within the second bracket(1. A spring e is secured at one end to the spindle b and at the otherend to the shell or by means of a perforated disk f, so that the springwill be wound up in the well-known manner by drawing the Thespindle b isprovided withshade down. in the tube a with an enlargement or collar bhaving a rectangular groove 12 This groove is arranged sidewise from thevertical axis of the collar, and its upright edge as well as its orperforations g, which are open at their inner ends and contain balls h.The ducts g constitute ball-races, which when brought into alinementwith the groove 12 deliver the ball to said groove and cause the latterto lock the disk, and consequently the shell a, to the spindle.

When the shade is drawn down, the ball will roll down along the inclinedbase of groove b by gravity and will thus enter the duct g withoutoccasioning a jar. The ball after having thus cleared the groove willtravel freely around the collar 12 in the direction of the arrow, Fig.3. If the shade is slowly released, the spring e will rotate the shell aslightly backward until one of the channels 9 is brought opposite thegroove b, when the ball It will roll into said groove and be clampedbetween the outer wall of the duct and the inclined overhanging edge ofthe groove. Thus the ball is securely locked against displacement. Onpulling the shade down and then releasing it suddenly theoballs willbethrown outward by centrifugal action, so as to clear the groove b, Fig.4c, and thus the shade may be raised to the position desired.

It will be seen that by my invention a coup: ling is formed between thespindle and the shell which is thoroughly protected, permits a readymanipulation of the shade, and is not liable to come out of order by theusual wear or strain.

What I claim is In a shade-roller, a rotatable spring-influenced shellcombined with an inclosed disk having a straighteccentric duct, a ballin said duct, and a fixed spindle having a laterallyarranged groove withan inclined upper edge adapted to overhang said ball, substantially asspecified.

Signed by me at New York city, (Manhattan,) New York, this 4th day ofMay, 1903.

WILLIAM MUMBRAUER. WVitnesses:

FRANK v. BRIESEN, EDUARD RAY.

